Stability of slowly evaporating thin liquid films of binary mixtures
| Autor: | Robson Kalata nazareth, Khellil Sefiane, Prashant Valluri, Omar Matar, George Karapetsas |
|---|---|
| Přispěvatelé: | Engineering & Physical Science Research Council (EPSRC), Petronas Research Sdn. Bhd. |
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Fluid Dynamics (physics.flu-dyn) Computational Mechanics FOS: Physical sciences Thermodynamics Binary number Physics - Fluid Dynamics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 0203 Classical Physics 010305 fluids & plasmas 13. Climate action 0102 Applied Mathematics Modeling and Simulation 0103 physical sciences 0210 nano-technology Volatility (chemistry) 0913 Mechanical Engineering |
| Zdroj: | Physical Review Fluids. 5 |
| ISSN: | 2469-990X |
| DOI: | 10.1103/physrevfluids.5.104007 |
| Popis: | We consider the evaporation of a thin liquid layer which consists of a binary mixture of volatile liquids. The mixture is on top of a heated substrate and in contact with the gas phase that consists of the same vapour as the binary mixture. The effect of thermocapillarity, solutocapillarity and the van der Waals interactions are considered. We derive the long-wave evolution equations for the free interface and the volume fraction that govern the two-dimensional stability of the layer subject to the above coupled mechanisms and perform a linear stability analysis. Our results demonstrate two modes of instabilities, a monotonic instability mode and an oscillatory instability mode. We supplement our results from stability analysis with transient simulations to examine the dynamics in the nonlinear regime and analyse how these instabilities evolve with time. More precisely we discuss how the effect of relative volatility along with the competition between thermal and solutal Marangoni effect defines the mode of instability that develops during the evaporation of the liquid layer due to preferential evaporation of one of the components. 19 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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